Dr. William Bayer, MD

Dr. William Bayer, MD

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Endocrinology, Diabetes & Metabolism  ·  
Male  ·  
57 y/o
(27)

Accepting new patients

Dr. William Bayer, MD is an endocrinology, diabetes & metabolism specialist in Carol Stream, IL and has been practicing for 32 years. He specializes in endocrinology, diabetes & metabolism and internal medicine.

Northwestern Medicine Regional Medical Group

501 Thornhill Dr

Carol Stream, IL 60188
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Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield of Illinois
  • Cigna
  • Cigna-HealthSpring
  • CorVel
  • Coventry Health Care
  • First Health (Coventry Health Care)
  • HealthLink
  • HFN
  • Humana
  • LifeSynch
  • Medicaid
  • MultiPlan
  • UniCare

Background Check

No malpractice claims found for Illinois
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
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Experience Check

Check Dr. Bayer's experience treating your condition or procedure

Dr. Bayer's Top Procedures and Conditions

Treatment Frequency
Vitamin D Deficiency
very high
very high

Treatment Frequency

Dr. Bayer treats Vitamin D Deficiency more than 100% of his peers

Dr. Bayer treats this condition more than 100% of his peers

Hypothyroidism
very high
very high

Treatment Frequency

Dr. Bayer treats Hypothyroidism more than 100% of his peers

Dr. Bayer treats this condition more than 100% of his peers

Thyroid Disease
very high
very high

Treatment Frequency

Dr. Bayer treats Thyroid Disease more than 100% of his peers

Dr. Bayer treats this condition more than 100% of his peers

Dr. Bayer's conditions and procedures:

Abnormal Thyroid
Acromegaly and Gigantism
Adrenal Gland Diseases
Adrenal Incidentaloma
Adrenal Insufficiency
Autoimmune Diseases
Autoimmune Thyroid Diseases
Benign Tumor
Bone Disorders
Breast Diseases
Calcium Metabolism Disorders
Cancer
Congenital Adrenal Hyperplasia (CAH)
Continuous Glucose Monitoring
Cushing's Syndrome
Diabetes Counseling
Diabetes Insipidus
Diabetes Type 1
Diabetes Type 2
Diabetes With Renal Manifestations
Diabetic Ketoacidosis
Female Infertility
Goiter
Graves' Disease
Growth Hormone Deficiency
Gynecomastia
Hashimoto's Disease
Hypercalcemia
Hyperkalemia
Hyperlipidemia
Hyperparathyroidism
Hyperthyroidism
Hypoglycemia
Hypokalemia
Hypoparathyroidism
Hypopituitarism
Hyposmolality and Hyponatremia
Hypothyroidism
Kidney Disease
Lipid Disorders
Malaise and Fatigue
Multiple Endocrine Neoplasia
Obesity
Osteopenia
Osteoporosis
Overweight
Symptomatic Menopause
Testicular Dysfunction
Thyroid Cancer
Thyroid Cyst
Thyroid Disease
Thyroiditis
Vitamin D Deficiency

About Me

Care Philosophy

"Better people means better experiences. Our care team is committed to delivering results that change lives." 

Specialties

  • Endocrinology, Diabetes & Metabolism
  • Internal Medicine

Board Certifications

  • Diabetes, Metabolism & Endocrinology
  • Internal Medicine

Education

  • Loyola University Medical Center
    Fellowship Hospital
  • Loyola University Medical Center
    Residency Hospital
  • Loyola University Medical Center
    Internship Hospital
  • 1986
    Loyola University of Chicago / Stritch School of Medicine
    Medical School
    1986

Awards

Dr. Bayer's Reviews

Likelihood to recommend Dr. Bayer

3.5

Based on 27 reviews

5 Stars
59.25925925925926%
(16)
4 Stars
0%
(0)
3 Stars
3.7037037037037037%
(1)
2 Stars
3.7037037037037037%
(1)
1 Star
33.333333333333336%
(9)

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Dr. Bayer?
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Average Wait Time
  • 16 – 30 minutes
Dr. Bayer's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. William Bayer, MD
RecentHighestLowestMost Helpful
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Dr. Bayer has always listened to my symptoms, not just bloodwork results. When the tests he ran came back normal, but my symtpoms said otherwise, he ran more tests until he figured out what was wrong. When my prognosis wasn't great, he personally called me to go over the results and then followed...Read More
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Dr. Bayer is a Diabetic Endocrinologist that I have complete trust in has really turned my A1C Goal/Goals to the Positive. He is very knowledgeable in his field and he always spends appropriate time w/patient/patients. I will be 62 in December and have been battling Diabetes since 1999/2000. He has...Read More
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Do not take the bad reviews seriously! Dr. Bayeris amazing & caring! So, if you need a really good doctor that cares about your health & does not set a timer when you walk in, he is your answer to getting your health back on track! I came to him when there was no one else. He cared & I am now on...Read More
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Dr Bayer is a no-nonsense doctor that is very knowledgable and thoruough. I have gone to him for many years before a car accident and am now able to see him again. I could not find his phone number so I looked it up. As I read the reveiws that were positive, I could relate. As I read the...Read More
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He needs to retire. He's clearly mad at everything, he was 30 minutes late to an 8:00 am meeting and told me out of the gate he already didn't know what to do. He took no time to listen and understand. he's terrible, go somewhere else
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Locations

Insurance accepted

Accepted insurance can change. Please double-check when making an appointment.

Aetna
Aetna EPO
Aetna POS
Aetna PPO
Managed Choice POS
Open Choice PPO
Blue Cross Blue Shield of Illinois
Blue Advantage
Blue Cross Blue Shield of Illinois HMO
Blue Cross Blue Shield of Illinois PPO
Blue Precision HMO
Cigna
Great West Healthcare-Cigna HMO
Great West Healthcare-Cigna POS
Great West Healthcare-Cigna PPO
Cigna-HealthSpring
CorVel
Worker's Compensation WC
Coventry Health Care
Coventry Health Care HMO
Coventry Health Care POS
Coventry Health Care PPO
First Health (Coventry Health Care)
HealthLink
HealthLink HMO
HealthLink POS
HealthLink PPO
HFN
HFN PPO
Worker's Compensation WC
Humana
Choice
Choice Care
Choice PPO
Humana HMO
Humana POS
Humana PPO
LifeSynch
Behavioral Health
Medicaid
MultiPlan
MultiPlan PPO
PHCS Network PPO
UniCare
UniCare HMO
UniCare POS
UniCare PPO
UnitedHealthCare
Choice
Choice Plus
United Behavioral Health
United Healthcare EPO
United Healthcare HMO
United Healthcare POS
United Healthcare PPO
Viant

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